QT Skills Series (10) traversing the batch processing or page control sample code

QT Skills Series (10)

                                      Batch processing or traverse the page control sample code

 

       Qt 's UI when programming interface, encounter this situation, the distribution of a large number of identical controls, such as the interface SpinBox _1 , SpinBox _2 , SpinBox _3 and a series of controls. For so many controls are set unified operation or to find a control, no doubt using traversed way is the best way to approach the situation in several code examples are given below for reference purposes only.

 

1, page traversing a certain type of control

 QList<QLabel *> lblhws = ui->page2->findChildren<QLabel *>();
    foreach (QLabel *lbl, lblhws) {
        if (lbl != nullptr){
            QString lblobj = lbl->objectName();
            if (lblobj.indexOf("labelT1") > -1)
            {
                lbl->setText(tmpList.at(1)+"℃");
            }
            if (lblobj.indexOf("labelT2") > -1)
            {
                lbl->setText(tmpList.at(0)+"%RH");
            }
        }
}

2, iterate through a similar set of controls name
     page controls established in accordance with the database name, batch processing operation is based on data Name:

    

for (int i=0;i < countSensor; i++)
    {
        QPushButton *btn = this->findChild<QPushButton *>
            ("pushButton_SW"+QString::number(query.value("SNO").toInt())); 
        if (btn != nullptr){
            btn->setVisible(true);
            btn->setToolTip(dat1);
            btn->setStyleSheet("background:green;"); 
        }
}

3, bulk provisioning process control event page:

     As an example, the bulk valueChanged unified set of events for all SinBox:

QList<QSpinBox *> SpinBox = this->findChildren<QSpinBox *>();
    qDebug() << SpinBox.count();
    for(int i=0; i < SpinBox.count(); i++)
    {
        connect(SpinBox.at(i),SIGNAL(valueChanged(int)),this,SLOT(on_valueChanged(int)));
    }

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Note: The actual example, eliminating A puzzled.

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